backend/lint: Properly chain exceptions

This fixes flake8-bugbear's B904 [1].

[1] https://docs.astral.sh/ruff/rules/raise-without-from-inside-except/

2 files changed, 6 insertions, 6 deletions

diff --git a/src/hircine/api/inputs.py b/src/hircine/api/inputs.py
index c88bcce..a9cf272 100644
--- a/src/hircine/api/inputs.py
+++ b/src/hircine/api/inputs.py
@@ -277,13 +277,13 @@ class ComicTagsUpdateInput(UpdateInputList):
     def parse_input(cls, id):
         try:
             return [int(i) for i in id.split(":")]
-        except ValueError:
+        except ValueError as err:
             raise APIException(
                 InvalidParameterError(
                     parameter="id",
                     text="ComicTag ID must be specified as <namespace_id>:<tag_id>",
                 )
-            )
+            ) from err
 
     @classmethod
     async def get_from_ids(cls, ids, ctx: MutationContext):
@@ -383,13 +383,13 @@ class ComicTagsUpsertInput(UpsertInputList):
                 raise ValueError()
 
             return namespace, tag
-        except ValueError:
+        except ValueError as err:
             raise APIException(
                 InvalidParameterError(
                     parameter="name",
                     text="ComicTag name must be specified as <namespace>:<tag>",
                 )
-            )
+            ) from err
 
     @classmethod
     async def get_from_names(cls, input, ctx: MutationContext, on_missing: OnMissing):
diff --git a/src/hircine/plugins/scrapers/ehentai_api.py b/src/hircine/plugins/scrapers/ehentai_api.py
index 70fcf57..3720b92 100644
--- a/src/hircine/plugins/scrapers/ehentai_api.py
+++ b/src/hircine/plugins/scrapers/ehentai_api.py
@@ -69,7 +69,7 @@ class EHentaiAPIScraper(Scraper):
 
                 handler = ExHentaiHandler()
                 yield from handler.scrape(response)
-            except json.JSONDecodeError:
-                raise ScrapeError("Could not parse JSON response")
+            except json.JSONDecodeError as err:
+                raise ScrapeError("Could not parse JSON response") from err
         else:
             raise ScrapeError(f"Request failed with status code {request.status_code}'")